
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<HTML>

<HEAD>
   <TITLE>gfsstp_c</TITLE>
</HEAD>

<BODY style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);">
<A name="TOP"></A>

<table style="text-align: left; margin-left: auto; margin-right: auto; width: 800px;"
 border="0" cellpadding="5" cellspacing="2">
  <tbody>
    <tr>
      <td style="background-color: rgb(153, 153, 153); vertical-align: middle; text-align: center;">
      <div align="right"> 
      <small><small><a href="index.html">Index Page</a></small></small>
      </div>
      <b>gfsstp_c</b> </td>
    </tr>

    <tr>
      <td style="vertical-align: top;">

<small><div align="center">
<A HREF="index.html#A">A</A>&nbsp;
<A HREF="index.html#B">B</A>&nbsp;
<A HREF="index.html#C">C</A>&nbsp;
<A HREF="index.html#D">D</A>&nbsp;
<A HREF="index.html#E">E</A>&nbsp;
<A HREF="index.html#F">F</A>&nbsp;
<A HREF="index.html#G">G</A>&nbsp;
<A HREF="index.html#H">H</A>&nbsp;
<A HREF="index.html#I">I</A>&nbsp;
<A HREF="index.html#J">J</A>&nbsp;
<A HREF="index.html#K">K</A>&nbsp;
<A HREF="index.html#L">L</A>&nbsp;
<A HREF="index.html#M">M</A>&nbsp;
<A HREF="index.html#N">N</A>&nbsp;
<A HREF="index.html#O">O</A>&nbsp;
<A HREF="index.html#P">P</A>&nbsp;
<A HREF="index.html#Q">Q</A>&nbsp;
<A HREF="index.html#R">R</A>&nbsp;
<A HREF="index.html#S">S</A>&nbsp;
<A HREF="index.html#T">T</A>&nbsp;
<A HREF="index.html#U">U</A>&nbsp;
<A HREF="index.html#V">V</A>&nbsp;
<A HREF="index.html#W">W</A>&nbsp;
<A HREF="index.html#X">X</A>&nbsp;
</div></small>
       <br>
       <table style="text-align: left; width: 60%; margin-left: auto; margin-right: auto;"
       border="0" cellspacing="2" cellpadding="2">
        <tbody>
          <tr>
            <td style="width: 50%; text-align: center;">
            <small>
              <a href="#Procedure">Procedure<br></a>
              <a href="#Abstract">Abstract<br></a>
              <a href="#Required_Reading">Required_Reading<br></a>
              <a href="#Keywords">Keywords<br></a>
              <a href="#Brief_I/O">Brief_I/O<br></a>
              <a href="#Detailed_Input">Detailed_Input<br></a>

              </small>
              </td>
              <td style="vertical-align: top; width: 50%; text-align: center;">
              <small>               <a href="#Detailed_Output">Detailed_Output<br></a>
              <a href="#Parameters">Parameters<br></a>
              <a href="#Exceptions">Exceptions<br></a>
              <a href="#Files">Files<br></a>
              <a href="#Particulars">Particulars<br></a>
              <a href="#Examples">Examples<br></a>

              </small>
              </td>
              <td style="vertical-align: top; width: 50%; text-align: center;">
              <small>               <a href="#Restrictions">Restrictions<br></a>
              <a href="#Literature_References">Literature_References<br></a>
              <a href="#Author_and_Institution">Author_and_Institution<br></a>
              <a href="#Version">Version<br></a>
              <a href="#Index_Entries">Index_Entries<br></a>
             </small>
            </td>
          </tr>
        </tbody>
</table>

<h4><a name="Procedure">Procedure</a></h4>
<PRE>
   void gfsstp_c ( SpiceDouble  step ) 

</PRE>
<h4><a name="Abstract">Abstract</a></h4>
<PRE>
 
   Set the step size to be returned by <a href="gfstep_c.html">gfstep_c</a>.
 </PRE>
<h4><a name="Required_Reading">Required_Reading</a></h4>
<PRE>
 
   <a href="../req/gf.html">GF</a>
   <a href="../req/time.html">TIME</a>
</PRE>
<h4><a name="Keywords">Keywords</a></h4>
<PRE>
   GEOMETRY 
   SEARCH 
   UTILITY 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   step       I   Time step to take. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   step      is the output step size to be returned by the next call 
             to <a href="gfstep_c.html">gfstep_c</a>. Units are TDB seconds. 
 
             `step' is used in the GF search root-bracketing process.
             `step' indicates how far to advance the <a href="gfstep_c.html">gfstep_c</a> input
             argument `time' so that `time' and time+step may bracket a
             state transition and definitely do not bracket more than
             one state transition.
 </PRE>
<h4><a name="Detailed_Output">Detailed_Output</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Parameters">Parameters</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Exceptions">Exceptions</a></h4>
<PRE>
 
   1) If the input step size is non-positive, the error 
      SPICE(INVALIDSTEP) is signaled. The stored step value  
      is not updated. 
 </PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Particulars">Particulars</a></h4>
<PRE>
 
   This routine sets the step size to be returned by the
   next call to <a href="gfstep_c.html">gfstep_c</a>.
 </PRE>
<h4><a name="Examples">Examples</a></h4>
<PRE>
 

   1) User applications can pass <a href="gfstep_c.html">gfstep_c</a> to mid-level GF API routines 
      expecting a step size routine as an input argument. Before such
      a call is made, the value of the step to be returned by <a href="gfstep_c.html">gfstep_c</a>
      must be set via a call to this routine.

      For example, the GF API routine <a href="gfocce_c.html">gfocce_c</a> can be called as shown 
      in the code fragment below.
      
            /.
            Select a twenty-second step. We'll ignore any occultations
            lasting less than 20 seconds.
            ./
            step = 20.0;
            <b>gfsstp_c</b> ( step );

            /.
            Perform the search.
            ./
            <a href="gfocce_c.html">gfocce_c</a> ( &quot;ANY&quot;,                            
                       &quot;MOON&quot;,     &quot;ellipsoid&quot;,  &quot;IAU_MOON&quot;, 
                       &quot;SUN&quot;,      &quot;ellipsoid&quot;,  &quot;IAU_SUN&quot;,  
                       &quot;LT&quot;,       &quot;EARTH&quot;,      CNVTOL,    
                       <a href="gfstep_c.html">gfstep_c</a>,   <a href="gfrefn_c.html">gfrefn_c</a>,     rpt,       
                       <a href="gfrepi_c.html">gfrepi_c</a>,   <a href="gfrepu_c.html">gfrepu_c</a>,     <a href="gfrepf_c.html">gfrepf_c</a>, 
                       bail,       <a href="gfbail_c.html">gfbail_c</a>,     cnfine,   
                       &amp;result                              );   
 </PRE>
<h4><a name="Restrictions">Restrictions</a></h4>
<PRE>
 
   None.
 </PRE>
<h4><a name="Literature_References">Literature_References</a></h4>
<PRE>
 
   None. 
 </PRE>
<h4><a name="Author_and_Institution">Author_and_Institution</a></h4>
<PRE>
 
   N.J. Bachman   (JPL)
   W.L. Taber     (JPL) 
   I.M. Underwood (JPL) 
   L.S. Elson     (JPL) 
   E.D. Wright    (JPL)  
 </PRE>
<h4><a name="Version">Version</a></h4>
<PRE>
 
   -CSPICE Version 2.0.1, 15-APR-2009 (LSE) (NJB)
</PRE>
<h4><a name="Index_Entries">Index_Entries</a></h4>
<PRE>
 
   GF set constant step size</PRE>
<h4>Link to routine gfsstp_c source file <a href='../../../src/cspice/gfsstp_c.c'>gfsstp_c.c</a> </h4>

      </td>
    </tr>
  </tbody>
</table>

   <pre>Wed Jun  9 13:05:24 2010</pre>

</body>
</html>

